/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/SkeletalMeshModifiers/Public/SkeletonModifier.h
void ExternalUpdate ( const [FReferenceSkeleton](API\Runtime\Engine\FReferenceSkeleton) & InRefSkeleton, const [TArray](API\Runtime\Core\Containers\TArray)< int32 > & InIndexTracker )